2101100221208 has 8 divisors (see below), whose sum is σ = 3939562914780. Its totient is φ = 1050550110600.

The previous prime is 2101100221201. The next prime is 2101100221223. The reversal of 2101100221208 is 8021220011012.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 2101100221208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101100221201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131318763818 + ... + 131318763833.

Almost surely, 2^{2101100221208} is an apocalyptic number.

It is an amenable number.

2101100221208 is a deficient number, since it is larger than the sum of its proper divisors (1838462693572).

2101100221208 is a wasteful number, since it uses less digits than its factorization.

2101100221208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262637527657 (or 262637527653 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

The spelling of 2101100221208 in words is "two trillion, one hundred one billion, one hundred million, two hundred twenty-one thousand, two hundred eight".